Korean Journal of Chemical Engineering

, Volume 18, Issue 1, pp 33–39 | Cite as

Morphology evolution in PS/LDPE blends in a twin screw extruder: Effects of compatibilizer

  • Do Young Moon
  • Moo Hyun Kwon
  • O Ok Park


In order to understand the mixing in polymer extrusion, the morphology of PS/LDPE blends compatibilized with SEBS was simulated based on the Lee and Park model. Experiments were performed in a co-rotating twin screw extruder and a Haake mixer, and the morphology of the compatibilized blends of various compositions was compared with the non-compatibilized ones. The size of the dispersed phase of the compatibilized blend was smaller than the non-compatibilized one, and the blend of the PE matrix had a smaller size in the dispersed phase than the non-compatibilized one. Simulation results were agreed well with experiments, and the Lee and Park model could be applied in the extrusion analysis of compatibilized polymer blends.

Key words

Morphology PS/LDPE Blend Compatibilizer SEBS Extruder Lee and Park Model 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. Chen, C. C. and White, J. L., “Compatibilizing Agents in Polymer Blends: Interfacial Tension, Phase Morphology and Mechanical Properties”,Polym. Eng. Sci.,33, 923 (1993).CrossRefGoogle Scholar
  2. Doi, M. and Otta, T., “Dynamics and Rheology of Complex Interfaces I”,J. Chem. Phys.,1247, 15 (1991).Google Scholar
  3. Elmendorf, J. J., “A Study on Polymer Blending Microrheology”,Polym. Eng. Sci.,26, 418 (1986).CrossRefGoogle Scholar
  4. Fayt, R., Jerome, R. and Teyssie, P., “Molecular Design of Multicomponent Polymer Systems XIV. Control of the Mechanical Properties of PE-PS Blends by Block Copolymers”,J. Polym. Sci.,27, 775 (1989).Google Scholar
  5. Kim, S. W. and Chun, Y. H., “Barrier Property by Controlled Laminar Morphology of LLDPE/EVOH Blends”,Korean J. Chem. Eng.,16, 511 (1999).CrossRefGoogle Scholar
  6. Lee, H. M. and Park, O. O., “Rheology and Dynamics of Immiscible Polymer Blends”,J. Rheol.,38, 1405 (1994).CrossRefGoogle Scholar
  7. Lyu, S. G., Park, S. D. and Suh, G. S., “The Synthesis of Vaterite and Physical Properties of PP/CaCO3 Composites”Korean J. Chem. Eng.,16, 538 (1999).CrossRefGoogle Scholar
  8. Moon, D. Y. and Park, O. O., “Development of a Computational Model to Predict Blend Morphology in a Twin-Screw Extruder”,Adv. in Polym. Tech.,17, 203 (1998).CrossRefGoogle Scholar
  9. Potluri, R., Gogos, C. G., Libera, M. R. and Dagli, S. S.,SPEANTEC papers, 3172 (1995).Google Scholar
  10. Yang, L. Y. and Bigio, D., “Melt Blending of LLDPE and PS in Haake Internal Mixer I. Compatibilization and Morphology Development”,J. Appl. Polym. Sci.,58, 117 (1995).CrossRefGoogle Scholar

Copyright information

© Korean Institute of Chemical Engineering 2001

Authors and Affiliations

  1. 1.Chemical Division R&D CenterCheil Industries Inc.Euiwang-si, Kyonki-doKorea
  2. 2.Department of Chemical EngineeringKorea Advanced Institute of Science and TechnologyYusong-gu, TaejonKorea

Personalised recommendations